/*
 * Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

/*
 * Copyright 2001-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: XSLTCSource.java,v 1.2.4.1 2005/09/06 12:43:28 pvedula Exp $
 */

package com.sun.org.apache.xalan.internal.xsltc.trax;

import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;

import com.sun.org.apache.xalan.internal.xsltc.DOM;
import com.sun.org.apache.xalan.internal.xsltc.StripFilter;
import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg;
import com.sun.org.apache.xalan.internal.xsltc.dom.DOMWSFilter;
import com.sun.org.apache.xalan.internal.xsltc.dom.SAXImpl;
import com.sun.org.apache.xalan.internal.xsltc.dom.XSLTCDTMManager;
import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet;

import org.xml.sax.SAXException;

/**
 * @author Morten Jorgensen
 */
public final class XSLTCSource implements Source {

  private String _systemId = null;
  private Source _source = null;
  private ThreadLocal _dom = new ThreadLocal();

  /**
   * Create a new XSLTC-specific source from a system ID
   */
  public XSLTCSource(String systemId) {
    _systemId = systemId;
  }

  /**
   * Create a new XSLTC-specific source from a JAXP Source
   */
  public XSLTCSource(Source source) {
    _source = source;
  }

  /**
   * Implements javax.xml.transform.Source.setSystemId()
   * Set the system identifier for this Source.
   * This Source can get its input either directly from a file (in this case
   * it will instanciate and use a JAXP parser) or it can receive it through
   * ContentHandler/LexicalHandler interfaces.
   *
   * @param systemId The system Id for this Source
   */
  public void setSystemId(String systemId) {
    _systemId = systemId;
    if (_source != null) {
      _source.setSystemId(systemId);
    }
  }

  /**
   * Implements javax.xml.transform.Source.getSystemId()
   * Get the system identifier that was set with setSystemId.
   *
   * @return The system identifier that was set with setSystemId, or null if setSystemId was not
   * called.
   */
  public String getSystemId() {
    if (_source != null) {
      return _source.getSystemId();
    } else {
      return (_systemId);
    }
  }

  /**
   * Internal interface which returns a DOM for a given DTMManager and translet.
   */
  protected DOM getDOM(XSLTCDTMManager dtmManager, AbstractTranslet translet)
      throws SAXException {
    SAXImpl idom = (SAXImpl) _dom.get();

    if (idom != null) {
      if (dtmManager != null) {
        idom.migrateTo(dtmManager);
      }
    } else {
      Source source = _source;
      if (source == null) {
        if (_systemId != null && _systemId.length() > 0) {
          source = new StreamSource(_systemId);
        } else {
          ErrorMsg err = new ErrorMsg(ErrorMsg.XSLTC_SOURCE_ERR);
          throw new SAXException(err.toString());
        }
      }

      DOMWSFilter wsfilter = null;
      if (translet != null && translet instanceof StripFilter) {
        wsfilter = new DOMWSFilter(translet);
      }

      boolean hasIdCall = (translet != null) ? translet.hasIdCall() : false;

      if (dtmManager == null) {
        dtmManager = XSLTCDTMManager.newInstance();
      }

      idom = (SAXImpl) dtmManager.getDTM(source, true, wsfilter, false, false, hasIdCall);

      String systemId = getSystemId();
      if (systemId != null) {
        idom.setDocumentURI(systemId);
      }
      _dom.set(idom);
    }
    return idom;
  }

}
